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Finding the Fourth Proportional to 20,634, 28,478.52 and 12,250.32

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Solution

The fourth proportional to 20,634, 28,478.52 and 12,250.32 is: 16,907.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634 : 28,478.52 = 12,250.32 : x
  2. Step 2: Convert to fraction form
    20,634/28,478.52 = 12,250.32/x
  3. Step 3: Cross multiply
    20,634x = 28,478.52 × 12,250.32
  4. Step 4: Simplify right side
    20,634x = 348,870,983.13
  5. Step 5: Solve for x
    x = 348,870,983.13/20,634
  6. Step 6: Final answer
    x = 16,907.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.